The 1999 Nissan Frontier is available as a 2-door, 3-seat regular side. Starting at $11,490, the 1999 Nissan Frontier (M5) 4x2 Regular Cab is powered by a 2.4L , 4 -cylinder engine mated to a manual transmission that returns an EPA estimated 22-mpg in the city and 26-mpg on the highway. The top of the line 1999NissanFrontierSE-V6 (A4) 4x4 King Cab , priced at $ 21,240 , is powered by a 3.3L , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 15-mpg in the city and 19-mpg on the highway.